diff --git a/gtk-3.20/scss/_functions.scss b/gtk-3.20/scss/_functions.scss
index 16260cd..74dc76a 100755
--- a/gtk-3.20/scss/_functions.scss
+++ b/gtk-3.20/scss/_functions.scss
@@ -85,10 +85,10 @@ $modules: () !default;
     // $tc is the text color
     // $bg is the background color
     //
-    $_lbg: lightness($bg)/100%;
+    $_lbg: lightness($bg) / 100%;
 
     @if lightness($tc) < 50% {
-        @return transparentize(white, 1 - $_lbg/($_lbg * 1.3));
+        @return transparentize(white, 1 - $_lbg / ($_lbg * 1.3));
     } @else {
         @return transparentize(black, $_lbg * .8);
     }